Abstract

Ultrahigh-purity undoped binary lead-silicate and ternary barium borosilicate glass systems were used to study the dependence of photoinduced second-harmonic generation (SHG) on the composition of these materials. The experiments revealed a peak in the SHG conversion efficiency as a function of the compositional dependence in the ternary glass system that correlates with the density of three-oxygen-coordinated boron. A nonexponential decay of the SHG during the readout process was observed for the lead-silicate glasses. In addition, these glasses exhibited threshold behavior in the second-harmonic conversion efficiency with varying IR preparation intensity.

Figures (6)

Strength of the relative effective χ(2) grating encoded in the binary lead-silicate glasses (open circles) and the resistivity data measured by Evstropiev et al.7 between 71 and 79 °C (open triangles) as a function of lead-oxide concentration.